Gold-separator.



` 'Patented Nov, ll, |902,

No. 7|3,|o5. y

- r. n. Jmmson.V GOLD S-EPABATB.

(Application nieu am. 25, 1902.)

que Model.)

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UNITED STATES PATENT EEicE.

FREDERICK M. JOHNSON, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TOv ROSE GOLD RECLAMATION COMPANY, OF SAN FRANCISCO, CALIFORNIA, A CORPORATION OF ARIZONA TERRITORY.

eoLD-sEPARAToR.

SPECIFICATION forming part of Letters Patent No. 713,105, dated November 11, 1902.

Application led' March 25, 1902. Serial No. 99,910. (No model.) i

T all whom t may concern.-

Be it known that I, FREDERICK M. JOHNSON, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, haveinvented certain new and useful Improvementsin Gold-Separators, of which the following is a specification.

My invention relates to the separation of precious particles of mineral from the crushed 1o or pulverized ore or the sand which contains them and which is generally in the form of a pulp of ore and water or sand and water.

My invention is also in some particulars an improvement upon the construction shown l5 and described in an application for patent filed by me May 22, 1.901, with the Serial No. 61,433. The construction shown in that application was embodied in a sluice-box of considerable length provided' with special hold- 2o ing and retaining devices for causing the separation of precious particles and retaining them. That construction might in some localities, such as the decks of scows and barges, be found somewhat awkward and cumbersome, as taking up too much length where space would be valuable, and my present improvements are designed to supply a separating apparatus which, so far as its separating action is concerned, is substantially like the 3o one described in said application, but embodies improvements in the line of economy Yin room, as well as facilities for adjustment in use.

. In the accompanying drawings, Figure 1 is a vertical longitudinal section of an apparatus containing the said improvements. Fig. 2 is a plan view. Fig. 3 is a vertical crosssection of the same on the line 0c of Fig. 1.

1 represents a frame, shown here as a sub- 4o stantially rectangular casing, but which may be an open-Work structure. At the top is supported a feed'hopper or throat 2,s`upplied from any suitable device, such as the trough 3. Within the box are pivoted oppositelyplaced supports 4, arranged in pairs, one pair above another, andthe pairs inclining alternately in opposite directions and being pivoted alternately by opposite ends, as shown at 5 6. These supports are intermediately 5o pivoted to, and so supported by, the jointed bars, rods, or links 7, which thus form ilexible supporting connections and which project above the top of the frame, where they are supplied with suitable handles, as 8. They can be connected at the top by a cross- 5 5 bar, bail, or the like, but are here shown as being independently movable. They are locked in position by a transverse rod 9 engaging with holes 10 in said bars above the top of the frame. By raising or lowering the 6o connections 7 all the supports 4 will be adjusted on their end pivots as to inclination, and this adjustment will be simultaneous and uniform' throughout the series.

Openings 11 are formed in the casing ad- 65 jacent to the pivoted ends of the several supports, through which are passed the sluiceboxes 12. The latter when in place rest upon the supports 4, conform to their inclination, and partake of their adjustment. preferably provided with handles 13,by which they can be withdrawn.

Each sluice-box is preferablyconstructed according to the application before referred to. Each is a trough having a covering of burlap, blanket, screen-cloth, or other snitable material upon its bottom, while above said bottom and secured to some suitable support, such as the cross-bar 14, is a flexible apron orlloating section of similar material, 8o whose upper surface is made waterproof preferably by a layer of rubber cloth', oil-cloth, or the like resting upon it. x

The current of material passing from box to box is compelled to pass beneath the two textile surfaces, the upper of'which forces the precious heavier material downward upon the lower, taking vup in such action a certain quantity of the liner particles which because of the imperviousV covering cannot be forced 9o through and'washed away. Any of the heavier particles which escape from between the fibrous or textile surfaces pass with the sand and water to the head end of the next sluicebox, where they are treated in the same way, and so on through the series or column of boxes. The inclination of the boxes is regulated according to the quantity and quality of material passing through and in the manner before described, and any box can be con- They are 7o midway of the length of the arms, and removable trays inserted through openings in the casing and supported on said arms, each tray having a gold-retaining bottom surface, and a cross-bar near its initial end with a flexible apron connected to said cross-bar, substantially as described.

In testimony whereof I have axed my signature, in presence of two witnesses, this 19th day of February, 1902.

FREDERICK M. JOHNSON.

Witnesses:

L. W. SEELY, F. M. BURT. 

